The Barska 8x30 WP Crossover Binocular is engineered to perform at its best under harsh condition. It is O-ring sealed for 100% water proof protection. Dry nitrogen-purged and sealed to prevent fogging, clouding and moisture damage. Fully multi-coated optics to maximize light transmission for brighter images and BAK-4 prisms for crisp and clear images. The Porro prism system offers greater depth perception and a wider field of view. Has twist-up eyecups and a large center focus knob to customize to your personal preference. Rugged shock-absorbing rubber armor with non-slip and ergonomic design for a secure grip to go hiking, bird watching or hunting. Backed by a Limited Lifetime Warranty. Includes lens covers, carrying case, neck strap and lens cloth.